Performance of Array vs. Object (v144)

Revision 144 of this benchmark created on

Description

After seeing http://jsperf.com/javascript-associative-vs-non-associative-arrays, I thought the test could be improved.

Setup

var arr = [],
        i,
        obj = {};
    for(i = 0; i < 10000; i += 1) {
        var o = {payload:i};
        arr.push(o);
        obj[i] = o;
    }

Test runner

Ready to run.

Testing in
TestOps/sec
Array Performance
var sum = 0;
for (var x=0; x<arr.length; ++x) {

    (function(x) {sum += arr[x].payload})(x)
}
ready
Object Performance
var sum = 0;
for (var x in obj) {
    (function(x) {sum += obj[x].payload})(x)
}
ready
Array/forEach
var sum = 0;
arr.forEach(function(i) {sum += i.payload})
ready
arry map
var sum = 0;
arr.map(function(i) {sum += i.payload})
ready
o.keys
var sum = 0;
Object.keys(obj).forEach(function(i) {sum += i.payload})
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.